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2 Sheets-Sheet 1.

(No Model.)

J. TREGUBTHA. TELEPHGNE SWITCH. No. 289,178. Patented Nov. 27, 1883'.

(No ModeL) 2 Sheets-Sheet J. TREGURTHA TELEPHONE SWITCH.

No. 289,178. Patented Nov. 27, 1883;

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We. 62mm UNiliED STATES PATENT @FFlQE JAMES TREGURT'HA, OF MALDEN, ASSIGNOR, BY MESNE ASSIGNMENTS, TO THE ADJUSTABLE TELEPHONE SUPPORT COMPANY, OF BOSTON, MASS.

TELEPHONE-SWITCH.

SPEGIFICATZON forming part of Letters Patent No. 289,178, dated November 27, 1883.

Applicaiionfiled May 4, 1883. (No model.)

To cLZZ whom it may concern.-

Be it known that I, JAMES TREGURTHA, Malden, in the county of Middlesex and State of illassachusetts, have invented certain new and useful Improvements in Tclephonic Switches, of which the following is a full, clear, and exact description.

In this invention the telephonic receiver at all times, and whether in or out of use, is carried by an arm arranged to be moved forward and backward upon another arm and support therefor, and both of said arms are provided with contact surfaces or studs or posts, each and all insulated therefrom, but connected with the call and telephone circuits, and otherwise arranged in relation to each other, all substantially as hereinafter described, and in a ,mitter, and at the same time completes the primary local circuit of the transmitter, while a movement of the said arm in the other direction cuts out the receiver and secondary circuit. of the transmitter and restores the call-circuit. Again, in this invention the telephonic receiver at all times, and whether in or out of use, is carried by an arm arranged to be moved forward and backward upon another and supporting arm therefor, in one direction against and in the other direction from the reaction of a spring suitably applied therefor to said arms, and both of said arms are provided with contact surfaces or studs or posts, each and all insulated therefrom, but connected with the call and telephone circuits, and otherwise arranged in relation to each other, all

- substantially as hereinafter described, and in a manner that a movement of the arm carrying the receiver in one direction and against said spring disconnects the call-circuit from Again, in this invenaddition to the primary and secondary election the said arm carrying the telephonic receiver, and combined with a supportingarm therefor, and otherwise constructed, arranged, and combined with the telephonic receiver and primary and secondary circuits of the 5 5 transmitter and the circuit of the mainline in accordance with either one or both of the preceding clauses of invention, is provided with fenders or guards constructed and arranged for an abutment in a manner to limit at the proper time the movement of said carrying-arm independent of its contact between its stud or studs or posts and the contactstuds of its supporting-arm.

In one of the two accompanying plates of drawings a telephone -switch of the present improved construction is illustrated in connection with a stand for telephonic or other instruments, of the construction and arrange ment of parts such as fully shown and described in my application for Letters Patent filed March 26, 1883; but it is not intended to limit the invention thereto, for, as will appear from the description in detail which follows, it is capable of application to stands of other 7 5 constructions and arrangement of partsas, for instance, to the box containing the call mechanism of the telephone, and in the other of said plates its operation is illustrated by diagrams.

In Plate 1, Figure l is a plan view of the telephone-switch and its stand. Fig. 2 is a side elevation in one part broken out and in vertical section. Fig. 3 is a vertical cross-section on line 3 3, Fig. 2. Fig. 4 is a side eleva tion of the carrying-arm of the receiver and thesupporting-arm therefor at the parts of the same provided with the contact studs or posts, and showing them as arranged for a circuit through alocal battery, in addition to the primary and secondary electric circuits through the transmitter and the call-circuitiaud main, line. Fig. 5 is a cross-section on line 5 5, Fig.

4. Fig. 6 is a plan view of the carrying-arm of the receiver and the supporting armtherefor at the parts of the same provided with the contact studs or posts, and showing a modification in their relative arrangement, and arranged for a circuit through a local battery, in

trio-circuits through the transmitter and callcircuits and main line. Fig. 7 is a vertical cross-section on line 7 7, Fig. 6;

In Plate 2, Diagram 1 is in illustration of the present improved telephone-switch arranged with wires for a primary and a secondary circuit through the transmitter and receiver, and for a call and main-line circuit. Diagram 2 is in illustration of the same circuits of diagram 1, but showing as combined therewith a circuit through a local battery, and both of these diagrams are with the contact studs or posts of the switch of the relative arrangement for Diagram 1 shown in Figs. 1, 2, and 3, and for Diagram2shown in Figs. 4 and 5. Diagram 3 is in illustration of the same circuits as Diagram 2,

but with the contact studs or posts of the switch of the relative and modified arrangement shown in Figs. 6 and 7.

In the drawings and diagrams, A is the telephonic transmitter; B, the telephonic receiver; 0, a local battery; D, a magneto-machine, and E call-bells, and each and all of any of the usual constructions and arrangements ofparts, and therefore needing no particular descrip tion herein. The body portion of the receiver Bis surrounded by a clamp-ring, F, in two parts, having ear-pieces a. a, by which it is secured by screws to an outer lift, (1, of a hinge composed of three lifts or leaves, (I, c, and f. joined together by a common axial bolt, and the outer lifts, d andf, joined to each other by an interlocking pin, all so that the outer lifts can turn as one and the middle lift can turn of itself upon the axial bolt, and each of such turnings be independent of the other. Said middle lift, e, of the hinge above described is connected to the outcrlift, 7c, of another hinge, which is in three leaves, k Zm, similarly connected and turning in. its several lifts, but arranged to work in a plane at an angle to the hinge first described, and this second hingeis connected by its middle lift, Z, to an arm, F, which, between its two ends, has a fulcrum, h, in another arm, G, and is thus adapted to be swung forward and backward upon said latter arm.

The supportingtrm G is carried by hinges arranged at an angle to each other, and each hinge is in three lifts, a q 1', of similar construction to the hinges previously described, and is connected to the upper end of a vertical standard or rod, H, which is carried at the outer end of the horizontal continuation J of a vertical rod, K, arranged to be adjusted as to height, and to be swung around a center,

and for attachment. to a bench or other suitable fixture, all, except as to the swing of the arm F, carrying the receiver upon the supporting-arm G therefor, as fully described and shown in the application aforesaid, and which, as it forms no part of the present invention, it

'is not deemed necessary to herein more particularly describe. The swing of the receivercarrying arm F is in a plane coincident with its longitudinal axis and parallel with the tact with side stud 2.

esaiws same axis of its supporting-arm G, and its part L, extending beyond the fulcrum h, passes in said swing of the arm F across the supporting-arm G. This part L of the swinging arm F and the supporting-arm at its portion crossed by the swing of said arm F are each provided with contact studs or posts, consisting, as shown in Figs. 1, 2, and 3, of three separate studs, marked with the figures 1, 2, and 3, respectively, and in Figs. 4, 5, 6, and 7 of five separate studs, marked with the figures 1, 2, 3, 4, and 5, respectively. The several studs 1, 2, and 3 are carried, stud 1 by the supporting-arm G, and studs 2 and 3 by the swinging arm F, and the two latter are situated one at each side of stud 1, and at such distance from each other and in relation to stud 1 that swinging the arm F in one direction brings the side stud 2 into contact with one side of intermediate stud, 1, and the other side stud, 3, out of contact at the opposite side thereof, and swinging the arm in the other and opposite direction brings the side stud 3 into contact with one sideof interme diate stud, 1, and the other side stud, 2, out of contact at the opposite side thereof. The several studs 1, 2, 3, 4, and 5, as shown in Figs. 4 and 5, are carried, studs 1 and 4 by the supportingarm G, and at opposite sides thereof, and studs 2, 3, and 5 by the swinging arm F. Studs 2 and 3 are at each side of stud 1, and stud 5 is at one side of stud 4, and the side corresponding to that of stud 3 relative tostud 1; and studs 2 and 3 are situated at such distance from each other and in relation to stud 1, and stud 5 in relation to stud 4, that swinging the arm F in one direction brings the side stud 2 into contact with one side of intermediate stud, 1, and the other stud, 3, out of contact at the opposite side thereof, as also side stud 5 out of contact with the stud 4 of the supportingarm G, and swinging said arm F in the other and opposite direction brings side stud 3 into contact with one side of in termediate stud, 1, and the other side stud, 2, out of contact at the opposite side thereof, and also the side stud 5 into contact with stud 4 of the supporting-arm G. The several studs 1, 2, 3, 4, and 5, as shown in Figs. 6 and 7, are carried, stud 1 by the swinging arm F and studs 2, 3, 4, and 5by the supporting-arm G; and stud 2 is situated at one side of stud 1, and studs 3, 5, and 4 in a line and at the other side thereof, and with such a distance between studs 2 and 3, and location of studs 4 and 5 relative to studs 3 and 1, that swinging the arm F in one direction brings one side of intermediate stud, 1, into contact with side stud 2 and the several side studs, 3, 5, and 4, out of contact at the opposite side thereof, and swinging said arm F in the other and opposite direction brings one side of the intermediate stud, 1, into contact with the several side studs, 3, 5, and 4, and the other and opposite side of said intermediate stud, 1, out of con- These wires consist of a wire, P, connecting Each stud or post 1, 2, 3, a, and 5, hereinabove described, is made of metal or other material suitable for an electric conductor. Each is also suitably constructed for the attachment of an electric conducting-wire, and in their application to the carrying-arm F of the telephonic receiver B and to the supporting-arm G therefor, as the case may be, each is insulated at its said attachment-as, for instance, with hard vulcanized india'rubber or other suitable material, as at tof the receivercarrying arm F and at y of the supportingar'm G. The wire connections between these several studs 1, 2, 3, 4, and 5 and a telephonic receiver, B, a telephonic transmitter, A, local battery 0, bells E, magnetomachine D, ground. at M and N, and main line 0 are shown in the Diagrams 1, 2, and 8 of Plate 2.

stud 1 with main line 0, awire, Q, connecting stud 2 with bells E, magneto-machine I). and ground at M, a wire, R, running from stud 3 into and out of the receiver 13, and thcnceinto and out of the transmitter A to the ground at N, a wire, S, running from one pole of the local battery G to the primary coil of the transmitter, thence by a wire, T, to stud 5, and by a wire, U, from stud 4, (said stud 5 being connected by a plate,Z, of metal, or electrical conductor of other suitable material, to sidestud 3) to the other pole of said battery. These several wire connections between the several studs 1, 3, 4, and 5 and the receiver B, transmitter A, local battery (l, bells E, magnetdmachine D, ground at M and N, and main line 0 are as usual, and from them, first, with stud 1' in contact with stud 2, the call-circuit is established with the main linethat is, from main, line 0 along wire P in the direction of the arrows marked with figure 1 to stud 1, and through said stud to and through stud 2, and thence by wire Q in the direct-ion of the arrows marked with figure 2 to the bells E, magneto-niachine D, and ground at M; second, with stud 1 in contact with stud 8 and stud 4 in contact with stud 5, (see Diagram 2,) or, what is the same thing, stud 1 in direct contact with studs 3, 4, and 5, [see Diagram 3,) together with the metallic connection Z between studs 3 and 5, the telephonic circuit is established with the main line O-that is, from main line 0 along wire P in the direction of the arrows marked with the figure 1 to stud 1, and through said stud to and through stud 3, and thence by wire It in the direction of the arrows markedwith figures 3 to and through the transmitter, and from thence to the ground at N; and, also, another circuit is established by wire T from the primary coil of the transmitter to and through stud 5, and from thence, through stud a and wire U and both poles" of local. battery'G and wire S, into the transmitter A, thus completing the circuit betweenthe transmitter A, receiver B, and local battery G.

hen the call-circuit, by bringing stud 1 into contact with stud 2, is established, the

telephonic and other circuits above described as made at the same time with said telephonic circuit are broken; and, again, when the telephonic and other circuits above described as made at the same time with said telephonic circuit are established by bringing stud 1 into contact with stud 3, the call-circuit is broken; and either of said two classes of circuits is established, as the case may be, by swinging the arm F invthe one or the other direction upon its fulcrum 71 and these operations obviously are each capable of being accomplished without removal of the receiver from said arm F- or, in other words, from its supportand either by pressure upon the arm F from the hand of the user or from the rest of the ear of the user against the receiver when being used. The carrying-arm -F for the receiver has a spring, W, at one end attached to it, and at the other end resting againsta pin, X, of the support ing-arm G, all in a manner for the movement of the receiver-arm F in the one direction, as herein described, to break the call-circuit and establish the telephone and other circuits to be against said spring, and in the other direction, as herein described, to establish the callcircuit and break the telephonic and other circuits from the reaction of said spring, whereby, as is apparent, all liability of the call-circuit being accidentally left broken or cut out when ceasing to use the telephone or it is not being used'is obviated, absolutely.

' In the arrangement of the contact -studs shown in Figs. 1 to 5, inclusive, and in Diagrams 1 and 2, relative to the two arms F and G, the one, F, carrying the receiver, and the other, G, supporting said arm F, either stud 2 or 3, as the-case may be, by the described swing of the arm F, is brought into contact with stud 1, whereas in the arrangement of the contact-studs shown in Figs. 6 and 7 relative to said two arms F and G, by the described swing of the arm F stud 1 is brought into contact with either stud 2 or 3, as the case may be, stud 1 in both arrangements being the stud connected by wire 1? to mainline O. The swinging arm F has a fender or guard, Y, projectingtherefrom on opposite sides of the supporting-arm G, and in position to respectively abut against said arm G as the arm F is swung to make the contacts between the contact-studs herein described,and at the times such contacts are made, and thus by such abutment thereof prevent any undue strain or pressure between the contact-studs when contact is made by them either for the call-circuit or for the telephonic and other circuits herein described. If desired, the carrying-arm F for the receiver, together with the supporting-arm G therefor, may be arranged for the one to have a rectilinear movement upon the other,

instead of a swinging movement, as has been herein particularly described and shown. Again, if desired, the contact-studs may be provided with screws at one end, making the contacts of the studs, by reason of which, as

TIO

. operations and purposes.

is obvious, the contact-studs can be readily adjusted to compensate for their wear from use. Again, the contact-surfaces of the posts or studs herein particularly described and shown may be made yielding or unyielding, as desired, it being obvious that yielding surfaces would be preferable. Although the swinging arm F is not shown in Figs. 6 and 7 as provided with the fenders or guards Y above described, and shown as combinedwith the same arm in the preceding figures, it is plain said arm arranged as in Figs. 6 and 7 may be similarly so provided, and for the same Contact-stud 5 is directly in line with stud 3, and stud 4 in line with stud 1, as plainly shown in Fig. 5; but for the better illustrating of the wires by Diagram 2, which is with the studs arranged as -in Figs. 4 and 5, stud 5 is represented as out of line with stud 3, as also stud 4 out of line with stud l. Fenders or guards Y may be arranged upon the support G, instead of upon the forward and backward moving arm F, to which the telephonic receiver is attached.

From the description herein given itis apparent that while the telephone-circuits can be established,when desired, simply by pressurc upon the moving arm of the switch in a proper direction, yet immediately when such pressure is released the moving arm of the switch automatically moves to break said telephonic circuits and establish the call-circuit, and until the telephonic circuits are again wanted it remains in. its position making the call-circuit. Agaimin the herein-described ar rangement of the switch the receiver is at all times carried by it, and is in use never separated from it, so that making the switch automatic, as described, renders it absolutely certain, the moment the person has no further use for the receiver or transmitter-or, in other words, no wish for further telephonic communication-that the call-circuit will be established and the telephonic circuit broken, the importance and advantages of which are too well known to require mention.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, 1s

1. An arm, F, carrying a telephonic receiver, and adapted for a forward and backward movement upon a support, G, in combination with the contacts 1, 2, and 3, applied to and arranged upon said arm and support, and electrically connected with the call and transmitter circuits, including the receiver, substantially as described, whereby by moving said arm in one direction the receiver and transmitter circuits will be established and the call-circuit broken, and by moving said arm in the other direction the receiver and transmitter circuits will be cut out and the call-circuit established.

2. An arm, F, carrying a telephonic receiver, and adapted for a forward and backward movement upon 'a support, G, and provided with a spring, W, in combination with contacts l, 2,, and 3, applied to and arranged on said arm and support, and electrically connected with the calland transmitter circuits, the latter circuit including the receiver, whereby by moving said arm in one direction and against said spring the receiver and transmitter circuits will be established and the callcircuit broken, and by the movement of said arm from the reaction of said spring in the other direction the receiver andtransmitter circuits will be cut out and the call circuit established.

3. An arm, F, carrying a telephonic receiver, and adapted for a forward and backward movement upon a support, G, and contacts 1, 2, and 3, applied to and arranged upon said arm and support, and electrically connected with the call and transmitter circuits, the latter circuit including the receiver, in combination with fenders or guards Y, substantially as described, whereby by moving said arm in one direction the receiver and transmittertcircuits will be established and the call-circuit broken, and by moving said arm in the other direction the receiver and transmitter circuits will be cut out and the call-circuit established, and in said movements of said arm said fenders or guards will protect said contacts against undue pressure or strain.

4., An arm, F, carrying a telephonic'receiver, and adapted for a forward and backward movement upon a support, G, a spring, W, and fenders or guards Y, in combination with contacts 1, 2, and 3, applied to and arranged upon said arm and support, and electrically connected with the call and transmitter circuits, the latter including the receiver, substantially as described, whereby by moving said arm in one direction and against said spring the receiver and transmitter circuits will be established and the call-circuit broken, and by the movement of said arm from the reaction of said spring in the other direction the receiver and transmitter circuits will be cut out and the call-circuit established, and'in said movements of said arm saidfenders or guards will protect said contacts against un due pressure or strain.

' 5. An arm,F, carryingatelephonicreceiver, and adapted for a forward and backward movement upon a support, G, in combination with contacts 1, 2, 3, 4, and 5, appliedand arranged upon said arm and support, and electrically connected with the call and transmitter circuits, the latter circuit including the receiver, and with a local-battery circuit, substantially as described, whereby by moving said arm in one direction the receiver, transmitter, and local-battery circuits will be established and the call-circuit broken, and by moving said'ar-m in the other direction the receiver, transmitter, and local-battery circuits will be cut out and the call-circuit established.

6. An arm F, carrying a telephonic receiver, and adapted for a forward and backward-move ICO iio

ment upon a support, G, and provided with a spring, \V, in combination with contacts 1, 2, 3, Al, and 5, applied to and arranged upon said arm and support, and electrically connected with the call and transmitter circuits, the latter circuit including the receiver, and with a localbattery circuit, substantially as described, whereby by moving the arm in one direction and against said spring the receiver, transmitt-er, and local-battery circuits will be established and the call-circuit broken, and by the movement of said arm from the reaction of said spring in the other direction the receiver, transmitter, and local-battery circuits will be out out and the call-circuit established.

7. An arm,F,carrying atelephonic receiver, and adapted for aforward andbackward movement upon a support, G, and contacts 1, 2, 3, 4, and5, applied to and arranged on said arm and supports, and electrically connected with the call and transmitter circuits, the latter circuit including the receiver, and with a local-battery circuit, in combination with fenders or guards Y, substantially as described, whereby by moving said arm in one direction the receiver, transmitter, and local-battery circuits will be established and the call-circuit broken, and by moving said arm in the other direction the receiver, transmitter, and localbattery circuits will be cut out and the callcircuit established, and in said movements of said arm said fenders or guards will protect said contacts against undue pressure or strain.

8. An arm,F, carrying atelephonic receiver, and adapted for a forward and backward movement upon a support, G, a spring, W, and fenders or guards Y, in combination with contacts 1, 2, 3, 4:, and 5, applied to and arranged upon said arm and support, and electrically connected with the call and transmitter circuits, the latter circuit including the receiver, and with a local-battery circuit, substantially as describechmhereby by moving said arm in one direction and against said spring the receiver, transmitter, and local-battery circuits will be established and the call-circuit broken, and by the movement of said arm from the reaction of said spring in the other direction the receiver, transmitter, and local-battery circuits will be cut out and the call-circuit established,

and in said movements of said arm said fend ers or guards will protect said contacts against undue pressure or strain.

In testimony whereof I have hereunto set my EDWIN W. BROWN, \VM. S. BELLoWs. 

